Rajan Wilcox
Jet fuel and diesel fuel have more in common than their names suggest. Historically, jet fuel and diesel were quite similar in extraction, production, composition, and application. However, over time, they have diverged in terms of composition, extraction, and broader use. Jet fuel is specifically designed for use in aircraft engines, and while diesel fuel can be used in aircraft, it is not common. Jet fuel has a higher level of sulfur and other additives, which can damage car engines. Additionally, jet fuel has poor lubricating ability compared to diesel, which can increase wear on fuel injection equipment.
| Characteristics | Values |
|---|---|
| Similarities | Jet fuel and diesel fuel are similar in extraction, production, composition, and application. |
| Jet fuel and diesel are both fractional distillates of petroleum fuel oil. | |
| Differences | Jet fuel has a higher level of sulfur and other additives, including cetane and the cetane number. |
| Jet fuel has a higher flash point than diesel. | |
| Jet fuel has poor lubricating ability compared to diesel. | |
| Jet fuel is more expensive than diesel fuel. | |
| Jet fuel is specifically designed for aircraft. | |
| Diesel specifications are set on a local level and can vary in content. | |
| Jet fuel is more widely available globally than diesel. |
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What You'll Learn
- Jet fuel and diesel are similar in that they are both fractional distillates of petroleum fuel oil
- Jet fuel has a higher level of sulfur and other additives than diesel
- Jet fuel is used in diesel-powered engines, including ground-support vehicles at airports
- Jet A specification fuel is used in the US and a few Canadian airports
- Jet fuel is more expensive than diesel fuel
Jet fuel and diesel are similar in that they are both fractional distillates of petroleum fuel oil
Jet fuel and diesel are indeed similar in that they are both fractional distillates of petroleum fuel oil. They also share similarities in terms of extraction, production, and composition. Historically, jet fuel and diesel were even more alike than they are today.
However, there are also some important differences between the two fuels. Jet fuel, for example, tends to have a higher level of sulfur and other additives, such as cetane. Jet fuel also has a higher flash point, making it less flammable and safer to transport and handle. The specific composition of jet fuel is designed to improve the safety and reliability of flight, and additives are strictly regulated. For instance, no fatty acid methyl esters, which are used in diesel, are permitted in jet fuel due to the risks to low-temperature properties, aircraft range, and fuel stability.
The use of jet fuel in diesel engines is a topic of debate. Some sources claim that jet fuel can be used in diesel engines, particularly older ones, without any problems. However, others caution that while it may work in the short term, it can damage the engine over time and reduce performance. Jet fuel also has poor lubricating ability compared to diesel, which can increase wear on fuel injection equipment.
In summary, while jet fuel and diesel share some similarities as fractional distillates of petroleum fuel oil, they also have distinct differences in composition and application, with jet fuel being specifically designed for aviation use and diesel for engines built to run on diesel fuel.
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Jet fuel has a higher level of sulfur and other additives than diesel
Jet fuel and diesel fuel have a lot in common. Historically, the two types of fuel were quite similar in extraction, production, composition, and application. However, jet fuel has a higher level of sulfur and other additives than diesel.
Jet fuel contains more sulfur, with up to 1,000 ppm, which means it has better lubricity and does not currently require a lubricity additive as all pipeline diesel fuels do. On the other hand, pipeline diesel fuels before the introduction of Ultra-Low Sulfur Diesel (ULSD) were able to contain up to 500 ppm of sulfur and were called Low Sulfur Diesel or LSD. The higher level of sulfur in jet fuel can lead to fines and may even damage a diesel engine.
In addition to sulfur, jet fuel also contains other additives such as cetane and an antistatic additive. The cetane number is important for diesel fuel, as it is manufactured with a required cetane number, while jet fuel usually has no minimum cetane rating. The mandatory addition of an antistatic additive is also a difference between Jet A and Jet A-1, two types of jet fuel.
While jet fuel has a higher level of sulfur and other additives than diesel, it is important to note that jet fuel is not commonly used in diesel engines. Diesel fuel is designed to power engines specifically built to run on diesel fuels. Although jet fuel may be used in some diesel engines, it is not recommended as it may not provide the desired performance in the long run.
In summary, jet fuel has a higher level of sulfur and other additives, such as cetane and an antistatic additive, compared to diesel fuel. While jet fuel may be similar to diesel fuel in some ways, it is not suitable for long-term use in diesel engines due to potential performance issues and engine damage.
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Jet fuel is used in diesel-powered engines, including ground-support vehicles at airports
Jet fuel and diesel fuel are similar in many ways, including their extraction, production, and composition. They are both specific fractional distillates of petroleum fuel oil. However, there are also some important differences between the two types of fuel.
Jet fuel is used in aviation turbine engines, which are a specific type of gas turbine engine. These engines typically use lower-cost fuels with higher flash points, making them less flammable and safer to transport and handle. Jet fuel has a higher level of sulfur and other additives, such as cetane, than diesel fuel. It also has a higher flash point and a lower autoignition temperature.
Diesel fuel, on the other hand, is designed to power engines specifically built to run on diesel fuels. It has a lower cetane number and may contain fatty acid methyl esters, which are not permitted in jet fuel. Diesel fuel is also more susceptible to freezing at low temperatures, which can be a problem for aircraft flying at high altitudes.
Despite these differences, jet fuel can be used in some diesel-powered engines. Jet fuel is commonly used in diesel-powered ground-support vehicles at airports, although it may increase wear on fuel injection equipment due to its poor lubricating ability compared to diesel fuel. Aircraft engine manufacturers, such as Thielert and Austro Engine, have also begun offering aircraft diesel engines that run on jet fuel. This can simplify airport logistics by reducing the number of different fuel types required.
However, using jet fuel in diesel engines is not always recommended. Jet fuel may not provide the desired performance in some diesel vehicles and can even damage engines not designed to handle its higher sulfur content and other additives. Therefore, it is generally best to use the fuel type specifically designed for a particular vehicle or engine.
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Jet A specification fuel is used in the US and a few Canadian airports
Jet fuel and diesel fuel have a lot in common. Historically, they were quite similar in terms of extraction, production, composition, and application. However, over time, they diverged, and today, there are some key differences between the two types of fuel.
Jet A specification fuel, a type of kerosene-based jet fuel, has been used in the United States since the 1950s. It is usually not available outside the US, except for a few Canadian airports like Toronto, Montreal, and Vancouver. Jet A fuel must meet the ASTM specification D1655 (Jet A). It has a flash point higher than 38°C (100°F) and an auto-ignition temperature of 210°C (410°F). Jet A is marked on fuel trucks, storage tanks, and plumbing with "Jet A" in white italicized text within a black rectangle.
In contrast, Jet A-1 is the standard specification fuel used in most of the rest of the world, except Russia and CIS members, where TS-1 fuel is the most common. Jet A-1 has a lower freezing point than Jet A and requires the addition of an antistatic additive. Like Jet A, it has a flash point higher than 38°C (100°F) and an auto-ignition temperature of 210°C (410°F). Jet A-1 is marked similarly to Jet A but with "Jet A-1" on fuel trucks, storage tanks, and plumbing.
While jet fuel is primarily designed for aviation use, it can be used in some diesel engines. Jet fuel has been known to power diesel-powered ground-support vehicles at airports. Additionally, some aircraft engine manufacturers have begun offering aircraft diesel engines that run on jet fuel. However, jet fuel has poorer lubricating abilities compared to diesel, which can increase wear on fuel injection equipment. Jet fuel also typically contains more sulfur than diesel.
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Jet fuel is more expensive than diesel fuel
Jet fuel and diesel fuel are quite similar in extraction, production, and composition. Despite these similarities, jet fuel is more expensive than diesel fuel. This price difference is due to the way taxes on these fuels are calculated. Both jet fuel and diesel fuel attract central and state taxes and duties, but the tax structure for jet fuel is lower than that of diesel fuel. In India, for example, central and state government taxes contribute to nearly 54% of the diesel retail rate, while the tax on jet fuel is not even half of its overall rate.
Another reason jet fuel is more expensive is that it contains more sulfur, up to 1000 ppm, which gives it better lubricity. This high sulfur content means jet fuel does not require a lubricity additive, unlike pipeline diesel fuels, which need lubricity modifiers. The introduction of Ultra-Low Sulfur Diesel (ULSD) has increased the need for lubricity modifiers, further impacting the price of diesel fuel. Additionally, jet fuel has a higher flash point, which makes it less flammable and safer to transport and handle, but also more expensive to produce.
The specific type of jet fuel also impacts its price. For instance, Jet A specification fuel, commonly used in the United States and a few Canadian airports, has a higher freezing point than Jet A-1, the standard specification fuel used in most other parts of the world. The higher freezing point of Jet A makes it more expensive to produce. Similarly, Jet B and JP-4, which are wide-cut or naphtha-type jet fuels, have a lower carbon number distribution, making them less costly.
While jet fuel is generally more expensive than diesel fuel, its logistical advantages can offset the extra expense in certain circumstances. For example, jet fuel can be used in diesel-powered ground-support vehicles at airports, simplifying airport logistics by reducing the number of fuel types needed. Additionally, jet fuel is widely available globally, whereas diesel fuel for aviation use, known as avgas, is only available in a few countries with a significant number of general aviation aircraft.
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Frequently asked questions
Jet fuel is a type of aviation turbine fuel (ATF or avtur) used to power aircraft engines.
Diesel fuel is a specific fractional distillate of petroleum fuel oil designed to power engines built to run on diesel fuel.
No, they are not the same, but they do share similarities in extraction, production, and composition. Jet fuel and diesel fuel also have different applications, with jet fuel being used in aircraft engines and diesel fuel being used in diesel-powered engines.
While jet fuel has been used in older diesel vehicles and engines, it is not recommended due to differences in additives and performance. Jet fuel contains higher levels of sulfur and other additives, such as cetane, which may damage diesel engines over time.
Diesel fuel can be used in aircraft engines, but it is not common today. Historically, diesel-powered aircraft engines were built, and some on-road diesel engines have been converted and certified for aircraft use. However, modern commercial aircraft typically do not use diesel fuel.
